@@ -77,6 +77,7 @@ void intel_gt_pm_fini(struct intel_gt *gt);
void intel_gt_suspend_prepare(struct intel_gt *gt);
void intel_gt_suspend_late(struct intel_gt *gt);
+
int intel_gt_resume(struct intel_gt *gt);
void intel_gt_runtime_suspend(struct intel_gt *gt);
@@ -1170,6 +1170,13 @@ static bool suspend_to_idle(struct drm_i915_private *dev_priv)
return false;
}
+static void i915_drm_complete(struct drm_device *dev)
+{
+ struct drm_i915_private *i915 = to_i915(dev);
+
+ intel_pxp_resume_complete(i915->pxp);
+}
+
static int i915_drm_prepare(struct drm_device *dev)
{
struct drm_i915_private *i915 = to_i915(dev);
@@ -1370,8 +1377,6 @@ static int i915_drm_resume(struct drm_device *dev)
i915_gem_resume(dev_priv);
- intel_pxp_resume(dev_priv->pxp);
-
intel_modeset_init_hw(dev_priv);
intel_init_clock_gating(dev_priv);
intel_hpd_init(dev_priv);
@@ -1484,6 +1489,16 @@ int i915_driver_resume_switcheroo(struct drm_i915_private *i915)
return i915_drm_resume(&i915->drm);
}
+static void i915_pm_complete(struct device *kdev)
+{
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);
+
+ if (!i915)
+ dev_err(kdev, "DRM not initialized, aborting suspend.\n");
+
+ i915_drm_complete(&i915->drm);
+}
+
static int i915_pm_prepare(struct device *kdev)
{
struct drm_i915_private *i915 = kdev_to_i915(kdev);
@@ -1779,6 +1794,7 @@ const struct dev_pm_ops i915_pm_ops = {
* PMSG_RESUME]
*/
.prepare = i915_pm_prepare,
+ .complete = i915_pm_complete,
.suspend = i915_pm_suspend,
.suspend_late = i915_pm_suspend_late,
.resume_early = i915_pm_resume_early,
@@ -34,7 +34,7 @@ void intel_pxp_suspend(struct intel_pxp *pxp)
}
}
-void intel_pxp_resume(struct intel_pxp *pxp)
+void intel_pxp_resume_complete(struct intel_pxp *pxp)
{
if (!intel_pxp_is_enabled(pxp))
return;
@@ -11,7 +11,7 @@ struct intel_pxp;
#ifdef CONFIG_DRM_I915_PXP
void intel_pxp_suspend_prepare(struct intel_pxp *pxp);
void intel_pxp_suspend(struct intel_pxp *pxp);
-void intel_pxp_resume(struct intel_pxp *pxp);
+void intel_pxp_resume_complete(struct intel_pxp *pxp);
void intel_pxp_runtime_suspend(struct intel_pxp *pxp);
#else
static inline void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
@@ -22,7 +22,7 @@ static inline void intel_pxp_suspend(struct intel_pxp *pxp)
{
}
-static inline void intel_pxp_resume(struct intel_pxp *pxp)
+static inline void intel_pxp_resume_complete(struct intel_pxp *pxp)
{
}
@@ -32,6 +32,6 @@ static inline void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
#endif
static inline void intel_pxp_runtime_resume(struct intel_pxp *pxp)
{
- intel_pxp_resume(pxp);
+ intel_pxp_resume_complete(pxp);
}
#endif /* __INTEL_PXP_PM_H__ */
During suspend flow, i915 currently achors' on the pm_suspend_prepare callback as the location where we quiesce the entire GPU and perform all necessary cleanup in order to go into suspend. PXP is also called during this time to perform the arbitration session teardown (with the assurance no additional GEM IOCTLs will come after that could restart the session). However, if other devices or drivers fail their suspend_prepare, the system will not go into suspend and i915 will be expected to resume operation. In this case, we need to re-initialize the PXP hardware and this really should be done within the pm_resume_complete callback which is the correct opposing function in the resume sequence to match pm_suspend_prepare of the suspend sequence. Because this callback is the last thing at the end of resuming we expect little to no impact to the rest of the i915 resume sequence with this change. Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com> --- drivers/gpu/drm/i915/gt/intel_gt_pm.h | 1 + drivers/gpu/drm/i915/i915_driver.c | 20 ++++++++++++++++++-- drivers/gpu/drm/i915/pxp/intel_pxp_pm.c | 2 +- drivers/gpu/drm/i915/pxp/intel_pxp_pm.h | 6 +++--- 4 files changed, 23 insertions(+), 6 deletions(-)